The rule of thirds is a rule used by artists and photographers in relation to composition. How does it work? Divide your paper into thirds as shown and place your subject in the area of the one of the circles indicated below:
This is a question I get asked a lot by those starting to learn to draw. Holding a pencil for drawing is similar in a way to holding a pen for handwriting in that there are ways that get better results, however it is a personal choice. Just like handwriting we all have a unique style so I think the best advice is however it feels best.